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13 papers · 2 filters
Coexistence pressure for a martensitic transformation from theory and experiment: revisiting the bcc-hcp transition of iron under pressure
Nikolai A. Zarkevich, Duane D. Johnson
The coexistence pressure of two phases is a well-defined point at fixed temperature. In experiment, however, due to non-hydrostatic stresses and a stress-dependent potential energy…
Physical properties of VTiO (0 x 0.187) single crystals
Tai Kong, Morgan W. Masters, Sergey L. Bud'ko +1
Free standing, low strain, single crystals of pure and titanium doped VO were grown out of an excess of VO using high temperature solution growth techniques. At $…
Ultrafast Probes of Nonequilibrium Hole Spin Relaxation in Ferromagnetic Semiconductor GaMnAs
Aaron Patz, Tianqi Li, Xinyu Liu +3
We directly measure the hole spin lifetime in ferromagnetic GaMnAs via time- and polarization-resolved spectroscopy. Below the Curie temperature Tc, an ultrafast photoexcitation wi…
A new spin gapless semiconductor: quaternary Heusler CoFeCrGa alloy
Lakhan Bainsla, A. I. Mallick, M. Manivel Raja +5
Despite a plethora of materials suggested for spintronic applications, a new class of materials has emerged, namely spin gapless semiconductors (SGS), that offers potentially more…
NiTi shape-memory transformations: minimum-energy pathways between austenite, martensites, and kinetically-limited intermediate states
N. A. Zarkevich, D. D. Johnson
NiTi is the most used shape-memory alloy, nonetheless, a lack of understanding remains regarding the associated structures and transitions, including their barriers. Using a genera…
Coupled magnetic and electric hysteresis in the multiferroic double perovskite Lu2MnCoO6
Vivien S. Zapf, B. G. Ueland, Mark Laver +10
We investigate a magnetic hysteresis loop with a remanent moment that couples to electric polarization to create coupled hysteretic multiferroic behavior in Lu2MnCoO6. Measurements…